Nut lock



Aug. 17 1926. 1 ,596,799

H. H. BRUGMANN NUT LOCK Filed Oct. 16, 1923 Fig.1.

Patented Aug. 17, 1926.

UNITED STATES HER-MAN II. BRUGMANN, OF EVERLY, IOWA;

NUT LOCK.

Application filed October 16, 1923.

My present invention has reference to a means for locking a nut from unscrewing on a bolt.

A further object is to produce a nut lock characteristic of simplicity in construction, ease in application and thorough efficiency in operation.

A. still further object is to produce a means of locking a nut on a bolt which enthese elements after the nut has been screwed home upon the bolt and which is of a construction whereby the same may be removed to permit of the unscrewing of the nut from the bolt.

In the drawings which accompany and which form part of this application Figure 1 is an elevation of a nut locked on a bolt in accordance with this invention, a portion of the nut and bolt being in section.

Figure 2 is an end view thereof.

Figure 3 is a view showing the manner in which the locking element may be removed from locking engagement.

Figure l is an approximately central lon- =-itmlinal sectional view through the nut.

' ure 5 is a plan view of the bolt.

ure (3 is a perspective view of the locle ring elcn'ient.

Figure l is a similar view of a modified form of locking element.

The belt 1 has its shank. from its threaded end formed. with a longitudinal depression 2, and the lower wall of this depression formed with teeth 3.

i nut -l is of the ordinary construction, pt that the same has its bore at its outer end rum-threaded. as at 5, and provided with an annular groove 6 at the terminal at the said non-threaded portion.

air-hing element has a portion thereof ed in the groove 6 of the nut +l, prefer- ..v when the nut is initially screwed on the The locking element in the nabolt. ture of a spring having a Substantially lJ-shaped body T one limb of which being of reater length than the othe The shorter limb has its end upturned to form the same with a lag S.

The longer limb is slit central Serial No. 668,897.

in the depression 2 of the bolt 1 when the looking element is inserted in the said depression and compressed to permit of the lug 9 thereof being received in the annular depression or groove 6 in the nut 4. In this manner it will be seen that the nut is effectively locked on the bolt. The locking element may have its base slitted and out to provide any desired number of fingers which vary in length. all of the said fingers, however, being provided with teeth. This construction is illustrated in Figure 6 of the drawings. Preferably the slits which divide the bottom of the locking element extend through the rounded rear portion thereof, and into the upper limb 13, the same, however, terminating a suitable distance from the lug 8. It is to be noted that the lug 8 of the locking element is freely received in the groove 6 of the nut, so that the screwing of the nut on the bolt will cause the locking element to move longitudinally with the nut. The contacting engagement of the U-shaped body of the locking element with the side walls provided by the depression 2 in the bolt 1 will hold the said locking element in the depression, and the teeth, on the split spring fingers of the locking element will ratchet over the teeth 3 in the lower wall of the depression 2.

Preferably the outer face of each tooth 'arrying finger is formed with a depression 14, and in removing the nut from the bolt I arrange over the said bolt an angle strap 15 whose outer portion is provided with an opening through which is inserted the point ed end 16 of an instrument 17. The end of the instrument is provided with as many faces as there are lingers on the locking element, and the instrument is fulcrumed on the lower wall of the opening 18 in the outer inclined flanged portion 19 of the member 15 so that a downward pressure upon the outer end of the said instrument 1? will raise the teeth 11 on the fingers of the lock out of engagement between the teeth 8 in the bolt 2. A further pressure will cause the withdrawal of the lock ing element from the nut, but as long as pressure is retained on the instrument 17 the nut may be unscrewed from the bolt by the employment of the usual wrench and the locking element removed therewith.

Having described the invention, I claim The combination with a bolt and a nut designed to be screwed on the bolt, and in adjacent to its upper end, and cross sec tionally U-shaped loch having one of its ends formed with an efl'set htg to he lmrseily reeelved 1n the groove 0;? the nut and xts U-shaped body received in the depression Of theholt, and the enter element of the said body being shtted and having the ends thereof formed, with teeth to engage the teeth in the depression of the bolt and to ratchet over the said teeth in the depression when the nut is screwed home on the bolt.

In testlmony whereof I my slgnature.

HERMAN H. BRUGMANN. 

